Grain-scourer



(No Model) H. GSGHWENDER.

GRAIN SGOURER.

Patented Feb. l1,

yg.' l.

jmnmmfl UNWITED 'STATES PATENT OFFICE,

HENRY GSCHWENDER, OF WINQNA, MINNESOTA.

G'RAlN-SCOURER.

SPECIFICATION forming part of Letters Patent No. 421,369, dated February 11, 1890.

Application filed April 20, 1838. Serial No. 271,310. (No model.)

T0 @ZZ whom it may concern:

Be it known that I, HENRY GscHwnNDER, a citizen of the United States, residing at NVinona, in the county of Vinona and State of Minnesota, have invented certain new and useful Improvements in Grain-Scourers; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to machines for scouring grain for the purpose of removing smut, chaff, or any foreign substance therefrom that may adhere to it; and it consists in the construction and 'arrangement of the rubber' or scourer and the drum in which it is inclosed, in the projecting worm at the base of the rubber' and working in the dischargeoutlet for the purpose of forcing outthe grain, in the valve for closing the discharge-outlet, and in the position and arrangement of the air-trunk and screenings-spout with relation to the grain-discharge spout and the fan-case; also, in the construction and arrangement of the several parts in detail, as will be hereinafter more fully set forth and described.

rlhe invention is illustrated in the accompanyin g drawings, in which--a Figure 'l is a side view, partly in section, of my improved grain-scourer, showing the general position and relation of the several parts, Fig. 2 is an end view of the same.' Fig. 3 is a longitudinal sectional View of the drum, showing the rubber partly7 in section; Fig. 4, an enlarged view of the lower end of the rubber and drum, showing the augershaped projection for forcing out the grain and the valve for closing the spout.

Like letters designate corresponding parts in all of the figures.

Mounted in an upright frame-work, to which it is firmly secured by any convenient means of attachment, is the scouring-drum A, inclosing the rubber B, mounted upon an upright shaft a, revolving in suitable bearings at the top of the drum and attached to the upper part of the frame-work. The drum A, is of oblong cylindrical form, made in two sections riveted or bolted together by means of annular lianges l? b, formed around the adjacent edges of the two sections on the out-side thereof, the corners atl the upper and lower ends being somewhat rounded, and the ends bulging outwardly toward the center. The rubber B is of similar form, having an arm extending across the open end of each section, through which the shaft passes, and it is of slightly smaller dimensions, so as to turn easily within the drum, leaving a narrow space upon all sides for the reception ofthe grain, which is delivered to the drum by a spout c, connecting with the interior of the drum at a point near the center of the upper end of the same. The upper end of the rubber B sloping gradually from its center in all directions, the tendency of its revolution is to cause thegrain to work slowly toward the bottom of the drum in the space between the rubber and the interior surface Vof the drum, and the bottom of the drum sloping similarly downward toward its center facilitates the passage of the grain toward the discharge-outlet d, whence it passes into the discharge-spout e. The outer surface of the rubber is formed with corrugations extending from top to bottom at an angle of about forty-live degrees to the axis of revolution, and the inner surface of the drum is similarly corrugated in the opposite direction. Vhen the drum is filled to the top with grain, therrubber is caused to revolve by means of its shaft, andthe grain is subjected to a rubbing process between the corrugated outer surface of the rubber and the inside of the drum throughout its entire passage from the top to the bottom of the drum. The corrugations upon the outer surface of the drum being at an angle, as above stated, to the axis of revolution, the downward progress of the grain is assisted, and it is thus subjected to a thorough rubbing before being allowed to pass from the discharge-outletb Extending partially within the dischargeoutlet and formed upon or attached tothe lower end of the rubber B is a cylindrical.

projection G, having its lower end surface of a spiral form and with a vertical radially-extending surface 'a connecting the adjacent IOO edges ofthe spiral surface. The purpose of this projection is to force out the grain in the discharge-spout in proper quantities, a valve o, actuated by a weighted arm p, normally closing the outlet and preventing the grain from discharging so readily as not to insure its thorough cleansing.

The air-trunk C extends upwardly from the outer end of the discharge-spout.connecting with the fan-case D, located at the upper part of the frame-work, and containing the fan E, mounted upon an upright shaft f, turning in suitable bearings upon the framework. A pulley g, mounted upon the shaft t f, carries a belt connected with any conven- `ient driving mechanism, and a small pulley h, vmounted upon'the upper end of vthe same.

shaft, isvconnectedby belt with a larger pulley f, located on the upper end of the shaft. a, upon which the rubber is mounted, by which arrangement the rubber is driven at a less Yrateof speed than is required for the fan.

The upper end. of the air-trunk C curves outwardly and extends horizontally underneath the fan-box E, and is connected with the in-Y` terior thereof by a closed passage 7c. Under-y neath the airtrunk, with its upper end open to the interior thereof,.is .the screeningspout F, for the discharge of such dust, smut, dac., as shall be drawn from the grain by the action of the current of air raised by the revo-,

lution of the fan.

A vertical partition l, extending across the air-trunk, over the inner end of the screenings-spout F and extendingdownwardly a short distance within the same, causes the current of air as drawn upward in the air-l pose of scouring the grain and separating foreign substances therefrom is perfectly accomplished.

I claim as my invention-' 1. In a grain-scourer, in combination with an upright cylindrical scouring-drum and a rubber of similar form mounted upon an upright shaft within the drum, a downwardlyextending cylindrical projection upon the center of the lower end of the rubber and working in the discharge-outlet, the lower end of said projection having a spiral surface, and a radial vertical surface joining the adjacent edges of the spiral surface, substantially as and for the purpose herein specified.

2. In a grain-scourer, an upright cylindrical lscouring-drum vformed 4in two cross-sections'united at their adjacent edges byrmeans of outwardly-extending annular anges, said drum having its inner surface diagonallycorrugated, a rubber of similar form but of vfor operating the same, a Valve having a weighted arm acting normally to close the said outlet, and a worm projection upon the lower end of said rubber working in said outlet to force the grainfthrough said outlet, substantially as specified, whereby the grain is retained within the drum until thoroughly scoured. s

In testimony whereof I affix my signature in presence of two witnesses.

HENRY GSCHVENDER.

Vitnesses:

C. R. TUPER, N. B. FULMER. 

